Ph is an indicator of how acidic or basic a substance is. the ph scale ranges from 0 - 14, with 7 representing neutral. acids have a ph below 7; bases, a ph greater than 7. scientists determine the ph of a substance by using an indicator; indicators change color depending on the ph of a substance. different indicators work at different ph ranges, as seen in the table above. the transition range of an indicator is the range of ph when the indicator changes from its low-ph color to its high-ph color. if the indicator shows a color between the two, then the ph lies somewhere in that transition range.
student groups are given an unknown liquid to test using the four indicators. one group conducts the tests and records these results.
color changes - ph indicators
indicator used color produced
methyl violet bluish
bromophenol blue yellow
phenolphthalein colorless
thymolphthalein colorless
using the table of indicator values, determine the approximate ph of the unknown solution.
a) 1.6
b) > 3.0
c) between 0 and 1.6
d) between 1.6 and 3.0
Answers: 3
Physics, 22.06.2019 09:30
This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer
Answers: 2
Physics, 23.06.2019 07:30
5. why should the electrons be placed separate from each other (why not together)?
Answers: 2
Physics, 23.06.2019 12:30
Write a brief essay describing the minimum requirements for any electric circuit. within your essay,
Answers: 1
Ph is an indicator of how acidic or basic a substance is. the ph scale ranges from 0 - 14, with 7 re...
Mathematics, 03.04.2021 03:50
Mathematics, 03.04.2021 03:50
Business, 03.04.2021 03:50
Mathematics, 03.04.2021 03:50
History, 03.04.2021 03:50
Mathematics, 03.04.2021 03:50
Mathematics, 03.04.2021 03:50